33 research outputs found
Aplicación de TIG en la reconstrucción de las disfunciones territoriales históricas de sistemas de dunas de Canarias
En este trabajo se presenta un ejemplo de integración de fuentes y técnicas para la reconstrucción de las
condiciones naturales y de los usos del suelo acaecidos en períodos históricos próximos, con el fin de
caracterizar disfunciones territoriales en sistemas frágiles desde el punto de vista natural, y estratégicos
desde el punto de vista económico, como son los campos de dunas de Canarias. Se procede por medio del
desarrollo de métodos de análisis histórico, como el contraste entre fuentes (interpretación de fotografías
aéreas, análisis de textos históricos y de otros documentos y entrevistas a personas mayores), cuyos
resultados se integran en un SIG. El contraste entre esta información y la obtenida de documentos recientes o
actuales, permite reconstruir la evolución espacio-temporal acaecida desde que sucedieran tales hechos
históricos, y entender la dinámica actual de los sistemas objeto de estudio. Se muestran en este trabajo
algunos resultados obtenidos en el sistema de dunas de Maspalomas y en el extinto campo de dunas de
Guanarteme, ambos en la isla de Gran Canaria, que han permitido interpretar de forma más exacta algunos
procesos relacionados con la dinámica natural de estos sistemas.In this paper we present an example of integration of sources and techniques for the reconstruction of natural
conditions and land use development in recent historical periods, in order to characterize some dysfunctions
in the dune fields of the Canary Islands, which are fragile systems from an environmental point of view, and
strategic in economic terms. We proceeded through the development of methods of historical analysis, as the
contrast between sources (aerial photo interpretation, analysis of historical texts and other documents and
interviews to older people), whose results were integrated into a GIS. The contrast between this information
and recent documents allowed us the reconstruction of the evolution during the period since the occurrence of
such historical facts, and understand the current dynamics of the systems under study. We show in this paper
some results obtained in the Maspalomas dune system and in the late dune field of Guanarteme, both of them located in the island of Gran Canaria. These results have allowed us to accurate the interpretation of
some processes related to the natural dynamics of these systems
Microbiological quality of refrigerated raw milk in the dairy farm and after transport to the processing dairy plant
Performance and carcass traits of Santa Inês lambs finished with different sources of forage
Níveis nutricionais de cálcio e de fósforo disponível para aves de reposição leves e semipesadas de 13 a 20 semanas de idade
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Dietary α‐Linolenic Acid, Marine ω‐3 Fatty Acids, and Mortality in a Population With High Fish Consumption: Findings From the PREvención con DIeta MEDiterránea (PREDIMED) Study
Background: Epidemiological evidence suggests a cardioprotective role of α‐linolenic acid (ALA), a plant‐derived ω‐3 fatty acid. It is unclear whether ALA is beneficial in a background of high marine ω‐3 fatty acids (long‐chain n‐3 polyunsaturated fatty acids) intake. In persons at high cardiovascular risk from Spain, a country in which fish consumption is customarily high, we investigated whether meeting the International Society for the Study of Fatty Acids and Lipids recommendation for dietary ALA (0.7% of total energy) at baseline was related to all‐cause and cardiovascular disease mortality. We also examined the effect of meeting the society's recommendation for long‐chain n‐3 polyunsaturated fatty acids (≥500 mg/day). Methods and Results: We longitudinally evaluated 7202 participants in the PREvención con DIeta MEDiterránea (PREDIMED) trial. Multivariable‐adjusted Cox regression models were fitted to estimate hazard ratios. ALA intake correlated to walnut consumption (r=0.94). During a 5.9‐y follow‐up, 431 deaths occurred (104 cardiovascular disease, 55 coronary heart disease, 32 sudden cardiac death, 25 stroke). The hazard ratios for meeting ALA recommendation (n=1615, 22.4%) were 0.72 (95% CI 0.56–0.92) for all‐cause mortality and 0.95 (95% CI 0.58–1.57) for fatal cardiovascular disease. The hazard ratios for meeting the recommendation for long‐chain n‐3 polyunsaturated fatty acids (n=5452, 75.7%) were 0.84 (95% CI 0.67–1.05) for all‐cause mortality, 0.61 (95% CI 0.39–0.96) for fatal cardiovascular disease, 0.54 (95% CI 0.29–0.99) for fatal coronary heart disease, and 0.49 (95% CI 0.22–1.01) for sudden cardiac death. The highest reduction in all‐cause mortality occurred in participants meeting both recommendations (hazard ratio 0.63 [95% CI 0.45–0.87]). Conclusions: In participants without prior cardiovascular disease and high fish consumption, dietary ALA, supplied mainly by walnuts and olive oil, relates inversely to all‐cause mortality, whereas protection from cardiac mortality is limited to fish‐derived long‐chain n‐3 polyunsaturated fatty acids. Clinical Trial Registration URL: http://www.Controlled-trials.com/. Unique identifier: ISRCTN35739639